Thanks Willy, I appreciate you looking into it. Can you detail how this new verb might work? From your description it sounds like it will be just the total connections to a specific backend? Or will it be more similar to be_sess_rate but for total connections rather than rate? I am looking to do something like "total connections per host header" with the idea that I can send 503s if a single host header is flooding a backend.
-Joe On Fri, 9 Oct 2009 22:52:38 +0200 Willy Tarreau <[email protected]> wrote: > On Fri, Oct 09, 2009 at 11:08:09AM -0700, Joe Williams wrote: > > > > I am attempting to limit the number of connections on a per host > > header basis. Currently each host header has it's own ACL and > > backend. This allows me to use maxconns and limit the number of > > connections per host header even if the physical server is the same > > in both backends. > > > > ### > > > > frontend http_proxy > > bind :8080 > > > > acl test1 hdr(host) test1.localhost:8080 > > > > acl test2 hdr(host) test2.localhost:8080 > > > > use_backend test1 if test1 > > > > use_backend test1 if test1 > > > > backend test1 > > server test localhost:5984 maxconn 1000 > > > > backend test2 > > server test localhost:5984 maxconn 1000 > > > > ### > > > > What I am wanting to do is use a single backend and decide the > > connections per host header in the frontend. I took a look at > > dst_conn and connslots and I don't think they will work for this as > > I am using a single frontend (dst_conn) and attempting to use a > > single backend (connslots). The idea would be "if HOSTHEADER has > > less than 1000 connections forward to SOMEBACKEND". > > > > Is something like this possible? > > I would have sworn there was something like that, but after checking > the doc it appears I was wrong. I might have confused with > be_sess_rate(). > > It's pretty simple to create a new ACL verb to match on the number of > connections per backend, as it is for almost anything that appears on > the stats page BTW. I'm adding that to the short-term TODO list. > > Willy > > -- Name: Joseph A. Williams Email: [email protected] Blog: http://www.joeandmotorboat.com/
